<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>CSS3 过渡效果</title>
    <style>
      div {
        width: 200px;
        height: 100px;
        background-color: pink;
        /* transition: 变化的属性 花费时间 运动曲线 何时开始; */
        /* transition: width .5s ease 0s, height .5s ease 1s; */
        /* 如果想要写多个属性，利用逗号进行分割 */
        /* transition: width .5s, height .5s; */
        /* 如果想要多个属性都变化，属性写all就可以了 */
        /* transition: height .5s ease 1s; */
        /* 谁做过渡，给谁加 */
        transition: all 0.5s;
      }
      div:hover {
        width: 400px;
        height: 200px;
        background-color: skyblue;
      }
    </style>
  </head>
  <body>
    <div></div>
  </body>
</html>
